Lauda has not been seen at the last two Grands Prix.
The Mercedes chief and F1 icon, 69, usually works with the team during race weekends.
But reports in Austria have today confirmed why he was missing from the German and Hungarian Grands Prix.
According to Austrian TV channel oe24, Lauda has been in a Viennese hospital recovering from flu.
He supposedly caught the bug while in Ibiza.
Lauda had a ‘severe cough, a little fever and cold’ and it was decided he should take a private jet to Vienna General Hospital for aid his recovery.
He was reportedly put in an intensive care unit due to kidney weakness.
Now, 12 days on from the scare, Lauda is said to be recovering well in the hospital.
oe24 quote doctors as saying: “(he is) almost completely restored – thankfully, there were no complications with kidneys and heart thankfully.”
And a friend told reporters: “The doctors say that after this severe flu Niki must stop playing with his health, urging the Austrian to reduce his commitments.”
He is expected to be discharged soon.
Born in Austria in 1949, Lauda won his first of three F1 World Championships in 1975 and earned 54 podium places over his career.
Source : EXPRESS